CN102460605B - Encapsulated switchgear, method for providing same, and the use of dielectric compound having a boiling point of above -25 celcius degree in insulation medium - Google Patents

Encapsulated switchgear, method for providing same, and the use of dielectric compound having a boiling point of above -25 celcius degree in insulation medium Download PDF

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Publication number
CN102460605B
CN102460605B CN200980159950.6A CN200980159950A CN102460605B CN 102460605 B CN102460605 B CN 102460605B CN 200980159950 A CN200980159950 A CN 200980159950A CN 102460605 B CN102460605 B CN 102460605B
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Prior art keywords
packaged type
switchgear
type switchgear
dielectric compound
dielectric
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CN102460605A (en
Inventor
M·海伦巴赫
O·格兰豪格
M-S·克莱森斯
P·斯卡尔拜
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Hitachi Energy Co ltd
ABB Schweiz AG
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ABB T&D Technology AG
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/055—Features relating to the gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/56—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Organic Insulating Materials (AREA)
  • Inorganic Insulating Materials (AREA)
  • Installation Of Bus-Bars (AREA)
  • Patch Boards (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The present invention relates to an encapsulated switchgear comprising a housing (4) defining an insulating space (6) and an electrical active part (8; 9, 11a, 11b, 11c) arranged in the insulating space (6), said insulating space (6) comprising an insulation medium.. The switchgear is characterized in that the insulation medium comprises a dielectric compound having a boiling point of above -25 DEG C.

Description

Packaged type switchgear, the method providing it and boiling point are higher than the purposes of dielectric compound in its dielectric of-25 DEG C
The present invention relates to packaged type switchgear, for the method for packaged type switchgear is provided and have higher than the boiling point of-25 DEG C dielectric compound for packaged type switchgear, particularly in pressure packaged type switchgear dielectric in purposes.
In medium-pressure or high pressure packaged type switchgear, electric active element is arranged in the hermetically sealed limiting insulating space, described insulating space usually comprise insulating gas and by shell and electric active element spaced apart and do not allow electric current pass.Therefore, compared with the switchgear only insulated by surrounding air, metallic packaging formula switchgear structure saves space more.
For routine encapsulation switchgear, use the insulating gas comprising and have lower than the dielectric compound of the boiling point of-25 DEG C to prevent in the condensation of complete operation temperature range.The required pressure of insulating gas and/or the amount of dielectric compound that comprises in described insulating gas by gas pressure measurement (being with or without temperature-compensating) or directly density measure determine.
The usual relative complex of equipment for gas pressure measurement and expensive.
In addition, usually need insulating gas to have overvoltage slightly, in medium voltage switchgear equipment, this overvoltage Chang Weiyue 100 millibars of-Yue 500 millibars, measure to allow the accurate pressure in the insulating space of switchgear.Due to this overvoltage, the shell of switchgear can stand mechanical stress, and if therefore do not adopt proper technology measure, it is easy to gas leakage.
But, bubble-tight requirement for the switchgear of current use is very strict, because the Conventional insulation gas with high insulation and arc performance has some environmental impacts when discharging into the atmosphere, and particularly has relatively high global warming potential (GWP).
For this reason, even if the shell of switchgear also must be very firm under above-mentioned overpressure situation.
Equally, in order to allow portion in the enclosure to place under repair work, needing to be found time before opening shell and before the operation can resetting switchgear, then again introducing the equipment of insulating gas.
The structure therefore relative complex of switchgear shell, except the gas pressure measurement equipment of costliness, it is also attributed to the relatively high cost of ordinary tap equipment.
Need about the potential impact of switchgear to environment and the relative configurations for shell, the past has attempted carrying out alternative Conventional insulation gas by suitable sub.
Such as, WO2008/073790 discloses a kind of dielectric gaseous compound, and except other characteristics, it also has the boiling point within the scope of about-20 DEG C to about-273 DEG C, and it has low-ozone consumption, preferably ozone free consumption and it has and is less than about 22, the GWP of 200.Specifically, WO2008/073790 discloses the many different compound not falling into general chemistry definition.
In addition, EP-A-0670294 discloses perfluoropropane as the purposes of dielectric gas and EP-A-1933432 relates to CF3I (CF 3and in gas isolated switchgear, be used as the purposes of insulating gas I).
Compared with standard dielectric, in order to improve disruptive field intensity, US-A-4175048 proposes the gaseous state insulator comprising the compound being selected from perfluor cyclohexene and hexafluoro azomethane.
But, in packaged type switchgear, use the compound according to providing document above to need gas pressure measurement measure complicated as noted above.Further, if a large amount of insulating gas leaks from shell, normal relatively of a specified duration for the reaction time of setting up enough insulating property (properties)s.In this case, it must be understood that and take panel apart in case stop loss bad switchgear.
Therefore target of the present invention is to provide and can eco-friendly mode operates and simultaneously by meeting the packaged type switchgear that highest security requirement allows very simple and cost effectively to design.
Air insulation or gas isolated metal (or other) packaged type switchgear is comprised according to term of the present invention " packaged type switchgear ".
The term " electric active element " used in the context of the present invention is interpreted as extensively comprising conductor, conductor arrangement, switch, conductive component etc.
Because the dielectric compound comprised in dielectric comprises the feature of the compound had higher than the boiling point of-25 DEG C, the present invention allows to set up two-phase system.Described system comprises the insulating gas of the gaseous parts comprising described dielectric compound in the operating condition.The liquid part of this gaseous parts and described dielectric compound balances.Thus, liquid part serves as the reservoir of dielectric compound, and it enters gas phase under extremely low partial pressure.
The present invention is based on following discovery: by suitably selecting dielectric compound can realize the finite concentration of dielectric compound in the insulating gas of this two-phase system, its major applications for encapsulation switchgear and particularly for enough middle press seal dress switchgear.
Given this, particularly preferably there is the dielectric compound of relative higher vapor pressure.The example of this kind of dielectric compound will be described in more detail below.
If insulating gas leaks from shell, then balance between gas phase and liquid phase (and therefore dielectric compound concentration required in insulating gas) is maintained or easily re-establishes.Therefore, even if enclosure leak, also maintain required insulation property.Therefore, do not need interrupt operation immediately, this makes switchgear very safe.
Known so fact, as long as dielectric compound is in liquid phase at least partially, just easily can set up the dielectric compound of enough concentration and therefore enough insulation property, then can avoid complicated gas pressure measurement equipment.By contrast, the simple inspection that liquid towards part exists is enough to ensure that insulating gas comprises the dielectric compound of enough concentration and therefore has required high insulating property.
According to a preferred embodiment, switchgear of the present invention comprises the container at least partially of the liquid part determining being included in the dielectric compound comprised in shell.This allows by simply checking that liquid level in the above-described container checks required insulation property.
Described container is usually placed in insulating space.
In order to ensure the existence by checking the liquid part comprised in liquid level determination shell in a reservoir, further preferred described shell comprise liquid part for collecting dielectric compound at least partially and transferred to the collecting device of container.According to a particularly preferred embodiment, the inner surface of outer shell bottom wall tilts at least partly, therefore forms the spout leading to container.Described container is therefore preferably arranged in the minimum point of insulating space.During operation, the liquid of shell bottom collection flow to downwards outer shell bottom wall inclined inner surface and by container reception.
In addition, described switchgear preferably includes the indicating device of the amount for determining the liquid part at insulating space dielectric compound, and described indicating device is arranged in compartment, and described compartment is spaced apart with described insulating space and be connected with container by passage.In general, described indicating device is formed by a part for described passage, and described passage puts in independent compartment.
According to another embodiment, described shell comprises the clear area allowing to observe container and/or indicating device from outside.Therefore, the determination of enough insulation property of insulating gas is by simply to observe through clear area and whether visual examination liquid phase exists and carry out.Described clear area such as can watch crystal form, thereon the minimum operation liquid level of indicating liquid.
In above-mentioned embodiment, wherein indicating device is formed by the part of the passage putting in independent compartment, and described part is generally transparent.As in this embodiment, the compartment comprising indicating device is put according to the height of insulating space usually, can directly measure, and reason is that the liquid at the same pressure in compartment will have identical liquid level with the liquid in insulating space.
In theory, described dielectric compound and optional carrier gas can be introduced in any position of insulating space.In order to allow, during operation by dielectric compound drawing-in system, corresponding equipment can be provided.Such as, can provide nozzle in shell wall, aerosol can be introduced in insulating space through described nozzle, and in described aerosol, the droplet of liquid dielectric compound is dispersed in carrier gas.Or liquid dielectric compound can when not having carrier gas in the base section of entrance introducing insulating space and in preferred introducing container.
The present invention allows to use such dielectric compound, and it has excellent insulating property (properties), particularly high breakdown field strength, and it is simultaneously for nontoxic and do not affect environment when discharging into the atmosphere.This also makes the design of switchgear simpler, and reason is the non-essential equipment being provided for extracting out and again introducing dielectric.The work if must place under repair and therefore must open the shell of switchgear, then insulating gas is simply discharged into the atmosphere.The liquid part (usually quite few) of dielectric compound can utilize simple outlet to shift out, and to be stored in simple storage and to be got back to insulating space by pouring into and again introduce after the work of completing repairs and before the operation of starting switch equipment again.
According to a preferred embodiment, described dielectric compound is the fluorinated ketones contained with 4-12 carbon atom.Thus, the dielectric with high rupturing capacity and extremely low GWP can be provided.
In general, according to the fluorinated ketones contained of this embodiment, there is following universal architecture:
R1-CO-R2
Wherein R1 and R2 is the chain fluoridized at least partly, and described chain is straight or branched independently of one another and has 1-10 carbon atom.Perfluor ketone and hydrogen fluorine ketone are contained in this definition.In general, these fluorinated ketones containeds have the boiling point of at least-5 DEG C around under pressure.
Have been found that now, for many application of insulating gas, such as in the application of middle pressure scope, even if be such as down under the pole low operating temperature of about-5 DEG C or even lower, when there is no the additional measures of such as external heat or vaporization, also enough concentration or mol ratio can be obtained, ratio between the molecule amount of the i.e. molecule amount of fluorinated ketones contained and the remaining ingredient (being generally carrier gas or buffer gas) of medium, and therefore also obtain enough disruptive field intensities.
Preferred described fluorinated ketones contained has 4-10 carbon atom, more preferably 4-8 carbon atom and most preferably 6 carbon atoms (also referred to as C6-fluorinated ketones contained).As above mentioning, described C6-fluorinated ketones contained can be perfluor ketone and (has molecular formula C 6f 12or hydrogen fluorine ketone O).
Have among the most preferably fluorinated ketones contained of 6 carbon atoms, having been found that particularly preferably 12 fluoro-2-methylpent-3-ketone.
Previously only thought that 12 fluoro-2-methylpent-3-ketone were (also referred to as the fluoro-4-of 1,1,1,2,2,4,5,5,5-nine (trifluoromethyl)-propione, perfluor-2-methyl-propione or CF 3cF 2c (O) CF (CF 3) 2) can be used for diverse application, that is, process melting active metal (as in WO 2004/090177 mention), for cleaning evapn reactor (as in WO 02/086191 mention) and to be used in fire extinguishing system or with liquid state for cool electronic system or in small power generation complete set of equipments for Rankine process (as in EP-A-1764487 mention).
12 fluoro-2-methylpent-3-ketone are transparent, colourless and nearly tasteless.Its structural formula is as follows:
12 fluoro-2-methylpent-3-ketone have the average life span of about 5 days in an atmosphere and its GWP is only about 1.In addition, its ozone depletion potential (ODP) is zero.Therefore, environmental pressure is more much lower than arbitrary Conventional insulation gas.
In addition, 12 fluoro-2-methylpent-3-ketone are non-toxic and provide the outstanding tolerance limit of human safety.
12 fluoro-2-methylpent-3-ketone have the boiling point of 49.2 DEG C under 1 bar.At 25 DEG C, its vapour pressure (that is, pressure when steam and its non-gaseous balance) is about 40kPa.In view of this high vapour pressure of 12 fluoro-2-methylpent-3-ketone, have for many application, particularly at the insulating gas of the enough disruptive field intensity of the application of middle pressure scope being low to moderate under the extremely low temperature of such as-30 DEG C usually also can obtain.
According to a preferred embodiment of the present invention, described insulating gas is admixture of gas, and except described dielectric compound and particularly except fluorinated ketones contained, described admixture of gas also comprises carrier (or buffering) gas.In an especially preferred embodiment, described admixture of gas comprises air or for air, particularly dry air, or comprises at least one constituent of air or be at least one constituent of air, and described constituent of air is particularly selected from carbon dioxide (CO 2), oxygen (O 2) and nitrogen (N 2).Or described insulating gas can be made up of dielectric compound substantially.
Become to have very large this discovery of reactive fluorocarbon compound of the carbon atom compared with low number based on 12 fluoro-2-methylpent-3-ketonic decompositions under 550 DEG C or higher temperature, preferred insulating gas comprises enough oxygen (O 2), fluorocarbon compound can with its reaction to form inert compound, such as CO 2.
The insulating property (properties) of described insulating gas and particularly its disruptive field intensity can by the temperature of dielectric, pressure and/or composition control.Comprise with the two-phase system of the dielectric compound of both liquid and gas, particularly fluorinated ketones contained by using, temperature increase not only causes absolute pressure to increase, and causes the dielectric compound concentration in insulating gas to increase due to higher vapor pressure.
According to a particularly preferred embodiment of the present invention, in insulating gas, the mol ratio of fluorinated ketones contained, particularly 12 fluoro-2-methylpent-3-ketone is at least 1%, is preferably at least 2%, is more preferably at least 5%, is more preferably at least 10%, most preferably is at least 15%.These preferred mol ratios are with reference to the operating condition of given standard or regulation.When departing from, described mol ratio also can be different from these and preferably be worth.
Comprise respectively with at least 1% or 2% the meaning of dielectric of 12 fluoro-2-methylpent-3-ketone of mol ratio based on following discovery: the insulating gas with this mol ratio also can obtain (for 2%) and under the extremely low temperature condition being low to moderate-40 DEG C, obtain (1%) and dielectric strength enough this insulating gas has for such as medium pressure gas insulation switchgear under the extremely low temperature condition being low to moderate-30 DEG C, and the switchgear of described medium pressure gas insulation operates under the insulating gas pressure lower than 1.5 bar, particularly about 1 bar.
Except above-described switchgear, the invention still further relates to wherein by the method in the insulating space of dielectric compound insertion switch equipment, the introduction volume of described dielectric compound makes dielectric in the operating condition comprise the insulating gas of the gaseous parts containing described dielectric compound, and the liquid part of described gaseous parts and described dielectric compound balances.Therefore, the two-phase system (two-part system) with above-mentioned advantage can be set up in the insulating space of switchgear.
According to a preferred embodiment of the method, described dielectric compound is introduced with liquid state, and therefore only a part of described dielectric compound evaporates in described insulating space.Therefore, the mode that described two-phase system can be very simple and easy to do is established.
Preferred by the base section of described dielectric compound introducing insulating space further.This makes the filling liquid level of monitoring dielectric compound after introduction immediately.In addition, gaseous parts being uniformly distributed in insulating space can easily be set up according to this embodiment.
The present invention is therefore particularly middle presses packaged type switchgear.Term used herein " middle pressure " refers to the voltage within the scope of 1kV-72kV.But, in high pressure range (being greater than 72kV) and feasible equally in the application of low pressure range (lower than 1kV).
The particularly suitable middle pressure packaged type switchgear of the known the present invention of technical staff.Such as, the medium voltage switchgear equipment (Siemens AG) of the medium voltage switchgear equipment (ABB AG) of ZX series, the medium voltage switchgear equipment (AREVA T & D) of GHA type or NXPLUS C type is mentioned at this.
The present invention describes in further detail via following examples composition graphs 1, and Fig. 1 schematically shows according to middle pressure packaged type switchgear of the present invention.
According to Fig. 1, switchgear 2 comprises the shell 4 determining insulating space 6 and the electric active element 8 be arranged in insulating space 6.In the embodiment illustrated, electric active element 8 comprises switch element 9 and is connected to three busbars 11a, 11b, 11c of described switch element 9.Described insulating space 6 comprises the dielectric containing insulating gas.Described insulating gas comprises the gaseous parts of dielectric compound, and the liquid part of described gaseous parts and described dielectric compound balances.
On the wall 12 of shell 4, the drop 10 of the liquid part of condensation is flowing down downwards towards (as indicated by arrow) on the direction of diapire 12 ' or is falling.In the embodiment provided in FIG, diapire 12 ' has multi-stage configuration, and its stage casing 12 ' a tilts (specifically low dip), becomes the section 12 ' b of strong inclination (specifically vertical) downwards and leads to container 14.Therefore, under the liquid stream of shell bottom collection diapire 12 ' inner surface and be discharged in container 14.The inner surface of diapire 12 ' serves as the collecting device 15 for collecting dielectric liquid part.
Preferably lead to indicating device 18 with the passage 16 of form of tubes from container 14, in the embodiment in the accompanying drawings, indicating device 18 to be included in the compartment 20 be arranged in panel front portion 21 and therefore spaced apart with insulating space 6.
In the embodiment illustrated, indicating device 18 is formed by a part for the passage 16 putting in compartment 20, and described part is transparent.Further, the outer wall 20 ' of described compartment 20, for transparent, therefore forms watch crystal.
Because the compartment 20 comprising indicating device 18 corresponds to container 14 height placement, can observe through the outer wall 20 ' of compartment 20 the direct measurement carrying out the filling liquid level of container 14.
Or described watch crystal also can be formed by the transparent part of shell itself.In this embodiment, arrange that described watch crystal makes to observe the container insulating space from outside.As a special scheme, described watch crystal itself can be container.
Reference numerals list
2 switchgears
4 shells
6 insulating spaces
8 electric active elements
9 switch elements
11a, 11b, 11c busbar
12 shell walls
12 ' outer shell bottom wall
The tilting section of 12 ' a diapire
The vertical section of 12 ' b diapire
14 containers
15 collecting devices
16 passages
18 indicating devices
20 compartments
The outer wall of 20 ' compartment
21 panels are anterior

Claims (46)

1. packaged type switchgear, it comprises the shell (4) that limits insulating space (6) and is arranged in electric active element in described insulating space (6) (8,9,11a, 11b, 11c), described insulating space (6) comprises dielectric, it is characterized in that described dielectric comprises the boiling point that has higher than-25 DEG C and is the dielectric compound of the fluorinated ketones contained with 4-12 carbon atom.
2. the packaged type switchgear of claim 1, described dielectric compound has the boiling point higher than-20 DEG C.
3. the packaged type switchgear of claim 2, is characterized in that described fluorinated ketones contained has 4-10 carbon atom.
4. the packaged type switchgear of claim 3, is characterized in that described fluorinated ketones contained has 4-8 carbon atom.
5. the packaged type switchgear of claim 4, is characterized in that described fluorinated ketones contained has 6 carbon atoms.
6. the packaged type switchgear of claim 5, is characterized in that described fluorinated ketones contained is for having molecular formula C 6f 12the perfluor ketone of O.
7. the packaged type switchgear of claim 6, is characterized in that described fluorinated ketones contained is 12 fluoro-2-methylpent-3-ketone.
8. the packaged type switchgear of claim 1, it is characterized in that described dielectric comprises the insulating gas of the gaseous parts containing described dielectric compound in the operating condition, the liquid part of described gaseous parts and described dielectric compound balances, and described insulating gas is admixture of gas, described admixture of gas also comprises carrier gas.
9. the packaged type switchgear of claim 8, is characterized in that described carrier gas comprises air or at least comprises a kind of constituent of air.
10. the packaged type switchgear of claim 9, is characterized in that described constituent of air is selected from carbon dioxide, oxygen and nitrogen.
The packaged type switchgear of 11. claims 1, it is characterized in that described dielectric comprises the insulating gas of the gaseous parts containing described dielectric compound in the operating condition, the liquid part of described gaseous parts and described dielectric compound balances, and it comprises the container (14) at least partially of the liquid part determining being included in the described dielectric compound comprised in described shell (4).
The packaged type switchgear of 12. claims 11, it is characterized in that its also comprise liquid part for collecting described dielectric compound at least partially and transferred to the collecting device (15,12 ', 12a ', 12b ') of described container (14).
The packaged type switchgear of 13. claims 11, it is characterized in that it also comprises the indicating device (18) of the amount of the liquid part for determining dielectric compound described in described insulating space (6), described indicating device (18) is arranged in space that is spaced apart with described insulating space (6) and that be connected with described container (14).
The packaged type switchgear of 14. claims 13, described shell (4) comprises the clear area allowing to observe described container (14) and/or described indicating device (18) respectively from outside.
Packaged type switchgear any one of 15. claim 1-14, described switchgear is metallic packaging formula switchgear.
Packaged type switchgear any one of 16. claim 1-14, described switchgear is middle pressure packaged type switchgear.
17. packaged type switchgears, it comprises the shell (4) limiting insulating space (6) and the electric active element (8 be arranged in described insulating space (6), 9, 11a, 11b, 11c), described insulating space (6) comprises dielectric, described dielectric comprises the boiling point that has higher than-25 DEG C and is the dielectric compound of the fluorinated ketones contained with 4-12 carbon atom, it is characterized in that described dielectric comprises the insulating gas of the gaseous parts containing described dielectric compound in the operating condition, the liquid part of described gaseous parts and described dielectric compound balances.
The packaged type switchgear of 18. claims 17, described dielectric compound has the boiling point higher than-20 DEG C.
The packaged type switchgear of 19. claims 18, described dielectric compound has the boiling point higher than-5 DEG C.
The packaged type switchgear of 20. claims 17, is characterized in that described dielectric compound is the fluorinated ketones contained with 4-10 carbon atom.
The packaged type switchgear of 21. claims 20, is characterized in that described dielectric compound is the fluorinated ketones contained with 4-8 carbon atom.
The packaged type switchgear of 22. claims 21, is characterized in that described dielectric compound is the fluorinated ketones contained with 6 carbon atoms.
The packaged type switchgear of 23. claims 22, is characterized in that described fluorinated ketones contained is for having molecular formula C 6f 12the perfluor ketone of O.
The packaged type switchgear of 24. claims 23, is characterized in that described fluorinated ketones contained is 12 fluoro-2-methylpent-3-ketone.
The packaged type switchgear of 25. claims 23, it is characterized in that described insulating gas is admixture of gas, described admixture of gas also comprises carrier gas.
The packaged type switchgear of 26. claims 25, is characterized in that described carrier gas comprises air or at least comprises a kind of constituent of air.
The packaged type switchgear of 27. claims 26, is characterized in that described constituent of air is selected from carbon dioxide, oxygen and nitrogen.
Packaged type switchgear any one of 28. claim 17-27, described switchgear is metallic packaging formula switchgear.
Packaged type switchgear any one of 29. claim 17-27, described switchgear is middle pressure packaged type switchgear.
30. packaged type switchgears, it comprises the shell (4) that limits insulating space (6) and is arranged in electric active element in described insulating space (6) (8,9,11a, 11b, 11c), described insulating space (6) comprises dielectric, it is characterized in that described dielectric comprises the boiling point that has higher than-5 DEG C and is the dielectric compound of the fluorinated ketones contained with 4-12 carbon atom.
The packaged type switchgear of 31. claims 30, it is characterized in that described dielectric comprises the insulating gas of the gaseous parts containing described dielectric compound in the operating condition, the liquid part of described gaseous parts and described dielectric compound balances, and described insulating gas is admixture of gas, described admixture of gas also comprises carrier gas.
The packaged type switchgear of 32. claims 31, is characterized in that described carrier gas comprises air or at least comprises a kind of constituent of air.
The packaged type switchgear of 33. claims 32, is characterized in that described constituent of air is selected from carbon dioxide, oxygen and nitrogen.
The packaged type switchgear of 34. claims 30, is characterized in that it comprises the container (14) at least partially of the liquid part determining being included in the described dielectric compound comprised in described shell (4).
The packaged type switchgear of 35. claims 34, it is characterized in that its also comprise liquid part for collecting described dielectric compound at least partially and transferred to the collecting device (15,12 ', 12a ', 12b ') of described container (14).
The packaged type switchgear of 36. claims 34, it is characterized in that it also comprises the indicating device (18) of the amount of the liquid part for determining dielectric compound described in described insulating space (6), described indicating device (18) is arranged in space that is spaced apart with described insulating space (6) and that be connected with described container (14).
The packaged type switchgear of 37. claims 36, described shell (4) comprises the clear area allowing to observe described container (14) and/or described indicating device (18) respectively from outside.
Packaged type switchgear any one of 38. claims 30 to 36, described switchgear is metallic packaging formula switchgear.
Packaged type switchgear any one of 39. claims 30 to 37, described switchgear is middle pressure packaged type switchgear.
40. methods that the packaged type switchgear any one of claim 7 to 29 is provided, it is undertaken by the insulating space (6) of dielectric compound being introduced described switchgear, the introduction volume of wherein said dielectric compound makes described dielectric in the operating condition comprise the insulating gas of the gaseous parts containing described dielectric compound, and the liquid part of described gaseous parts and described dielectric compound balances.
The method of 41. claims 40, wherein said dielectric compound is introduced with liquid state, and therefore only a part of described dielectric compound is evaporated in described insulating space (6).
The method of 42. claims 41, wherein said dielectric compound is introduced in the base section of described insulating space (6).
43. have dielectric compound higher than the boiling point of-25 DEG C for the purposes of packaged type switchgear in dielectric, described dielectric comprises the insulating gas of the gaseous parts containing described dielectric compound in the operating condition, and the liquid part of described gaseous parts and described dielectric compound balances.
The purposes of the dielectric compound of 44. claims 43, wherein said packaged type switchgear is middle pressure packaged type switchgear.
The purposes of 45. claims 43, wherein said dielectric compound has the boiling point higher than-20 DEG C.
The purposes of 46. claims 45, wherein said dielectric compound has the boiling point higher than-5 DEG C.
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